Universal Motor Multiple Choice Questions and Answers
16. Which of the following applications make use of a universal motor
A.Portable tools
B.Lathe machines
C.Oil expeller
D.Floor polishing machine
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A.Portable tools
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17. A universal motor is one which
A.Is available universally
B.Can be marketed internationally
C.Can be operated either on dc or ac supply
D.Runs at dangerously high speed on no-load
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18. An outstanding feature of a universal motor is its
A.Best performance at 50 Hz supply
B.Slow speed at all loads
C.Excellent performance on dc. supply
D.Highest output kW/kg ratio
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19. Speed of the universal motor is
A.Dependent on frequency of supply
B.Proportional to frequency of supply
C.Independent of frequency of supply
D.None of the above
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20. Which motor is relatively free from mechanical and magnetic vibrations
A.Shaded-pole motor
B.Universal motor
C.Reluctance motor
D.Hysteresis motor
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